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Method for preparing metal alloy powder through magnesiothermic reduction

A metal alloy and powder technology, applied in the field of metal alloy powder preparation, can solve problems such as the discussion of oxygen content of metal alloys, and achieve the effects of shortening reduction time, saving energy consumption, and improving reduction rate

Active Publication Date: 2021-01-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method only uses magnesia thermal reduction to prepare a metal alloy, and does not further discuss the oxygen content of the metal alloy

Method used

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  • Method for preparing metal alloy powder through magnesiothermic reduction

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0055] Step 1, prepare 50g Mg-MgCl 2 -KCl-HoCl 3 Mixed molten salt, where, HoCl 3 The mass is 14.4g, and the mass of Mg is 2.2g.

[0056] Step 2, put 1g TiO 2 powder ((≥98%, anatase type) and 1g V 2 o 5 The powder was compressed into small pieces with a diameter of 4 mm and a thickness of 1 mm under a pressure of 650 MPa, and then sintered at 1000 °C for 25 h. Put the sintered chips and mixed molten salt into a titanium crucible (35mm outer diameter, 2mm thickness, 95mm height), cover the titanium lid, and then put it into a stainless steel crucible (stainless steel crucible size: outer diameter 120mm, thickness 3mm, height 110- 120mm), and place 40g titanium sponge and 8g magnesium ingot around the titanium crucible (between the titanium crucible and the stainless steel crucible). Then weld and seal the stainless steel crucible and put it into a muffle furnace, set the temperature at 850° C., and reduce the reaction time for 5 hours.

[0057] Step 3, after taking the s...

example 2

[0059] Step 1, prepare 50g Mg-MgCl 2 -KCl-HoCl 3 Mixed molten salt, where, HoCl 3 The mass is 14.4g, and the mass of Mg is 2.2g.

[0060] Step 2, put 1g TiO 2 powder ((≥98%, anatase type) and 1g V 2 o 5 The powder was compressed into small pieces with a diameter of 4 mm and a thickness of 1 mm under a pressure of 650 MPa, and then sintered at 1000 °C for 25 h. Put the sintered chips and mixed molten salt into a titanium crucible (35mm outer diameter, 2mm thickness, 95mm height), cover the titanium lid, and then put it into a stainless steel crucible (stainless steel crucible size: outer diameter 120mm, thickness 3mm, height 110- 120mm), and place 40g of titanium sponge and 8g of magnesium ingot around the titanium crucible. Then weld and seal the stainless steel crucible and put it into a muffle furnace, set the temperature at 850° C., and reduce the reaction time for 15 hours.

[0061] Step 3, after taking the stainless steel crucible out of the furnace, put it into wa...

example 3

[0063] Step 1, prepare 50g Mg-MgCl 2 -KCl-HoCl 3 Mixed molten salt, where, HoCl 3 The mass is 14.4g, and the mass of Mg is 2.2g.

[0064] Step 2, put 1g TiO 2 Powder (≥98%, anatase type), 1g V 2 o 5The powder and 0.1 g of calcium carbonate were pressed into small pieces with a diameter of 4 mm and a thickness of 1 mm under a pressure of 650 MPa, and then sintered at 1000 ° C for 25 h. Put the sintered flakes and mixed molten salt into a titanium crucible (35mm outer diameter, 2mm thickness, 95mm height), cover the titanium cover, and then put it into a stainless steel crucible (place 40g titanium sponge and 8g magnesium ingot around the titanium crucible) (Stainless steel crucible size: outer diameter 120mm, thickness 3mm, height 110-120mm). Then put the stainless steel crucible into the muffle furnace, set the temperature at 850°C, and reduce the reaction time for 5h.

[0065] Step 3, after taking the stainless steel crucible out of the furnace, put it into water for r...

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Abstract

The invention provides a method for preparing metal alloy powder by magnesiothermic reduction. The method comprises the following steps: preparing a mixed molten salt which at least comprises Mg and RECl3; preparing a mixed metal oxide precursor, wherein mixed metal oxides comprise two or more of titanium oxide, vanadium oxide, chromium oxide, zirconium oxide, hafnium oxide, tantalum oxide, niobium oxide, molybdenum oxide and tungsten oxide; and adding the mixed metal oxide precursor into the mixed molten salt, and carrying out heating until the reaction is finished to obtain the metal alloy powder. According to the method, the rare earth chloride RECl3 is added into the molten salt, and after the rare earth chloride RECl3 participates in the reaction, the oxygen content in the reduction product metal alloy powder can be reduced to 500 ppm or below.

Description

technical field [0001] The invention belongs to the field of metal alloy powder preparation, and more specifically relates to a method for preparing metal alloy powder by magnesia thermal reduction. Background technique [0002] At present, there are related reports on the preparation of metal titanium and vanadium by magnesia thermal reduction in magnesium chloride molten salt, but the oxygen content of the products obtained based on the existing magnesia thermal reduction technology is relatively high, and the oxygen content in the general product metal is as high as 10000ppm above. For example, for the preparation of metal titanium by magnesium thermal reduction, in "Synthesis of Titanium via Magnesiothermic Reduction of TiO 2 (Pigment)" (Synthesis of titanium by magnestic reduction of titanium dioxide (pigment)) by MSR Bolívar, DIB Friedrich First reported the use of magnestic reduction of titanium dioxide. Since titanium dioxide is a step-by-step reduction process, a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B5/04C22B34/22C22B34/12C22B34/14C22B34/24C22B34/32C22B34/34C22B34/36C22C14/00C22C16/00C22C27/00C22C27/02C22C27/04C22C27/06
CPCC22B5/04C22B34/22C22B34/1268C22C14/00C22C27/025C22C27/06C22C27/04C22B34/32C22B34/34C22B34/36C22B34/14C22C16/00C22C27/00C22C27/02C22B34/24Y02P10/25
Inventor 孔令鑫徐宝强杨斌徐俊杰刘大春李一夫田阳曲涛蒋文龙邓勇庞俭朱立国游彦军陈秀敏杨红卫王飞吴鉴熊恒孔祥峰杨佳郁青春戴永年
Owner KUNMING UNIV OF SCI & TECH
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